Robert Lewandowski and Ferran Torres scored late in Barcelona's 2-1 win at Osasuna on Saturday that set up a chance for Hansi Flick's side to be crowned Spanish league champions this weekend.
Barcelona opened a 14-point gap over Real Madrid with four rounds left after this weekend. Madrid must win at Espanyol on Sunday to stop Barcelona from clinching a second straight LaLiga crown.
A victory by Madrid would prolong the title fight another week, when Barcelona hosts Madrid in a El Clásico.
Substitute Marcus Rashford picked out a run by Lewandowski and placed a cross for the striker to thump in with a powerful header in the 81st minute.
That sparked a flurry of goals in the final minutes. Torres added a second goal five minutes later, and Raul García headed in one for Osasuna in the 89th.
The Associated Press contributed to this report.